Implement SyncFileSystemService::GetFileSyncStatus method

chrome/browser/sync_file_system/remote_file_sync_service.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 90 matching lines @@
   // After a change is processed |callback| will be called (to return
   // the control to the sync engine).
   virtual void ProcessRemoteChange(
       RemoteChangeProcessor* processor,
       const fileapi::SyncOperationCallback& callback) = 0;
 
   // Returns a LocalChangeProcessor that applies a local change to the remote
   // storage backed by this service.
   virtual LocalChangeProcessor* GetLocalChangeProcessor() = 0;
 
+  // Returns true if the file |url| is marked conflicted in the remote service.
+  virtual bool IsConflicting(const fileapi::FileSystemURL& url) = 0;
+
+  // TODO(kinuko,tzik): Clean up unused interface methods when we fix
+  // the manual conflict resolution API.
   // Returns a list of conflicting files for the given origin.
   virtual void GetConflictFiles(
       const GURL& origin,
       const fileapi::SyncFileSetCallback& callback) = 0;
 
   // Returns the metadata of a remote file pointed by |url|.
   virtual void GetRemoteFileMetadata(
       const fileapi::FileSystemURL& url,
       const fileapi::SyncFileMetadataCallback& callback) = 0;
 
   // Returns the current remote service state (should equal to the value
   // returned by the last OnRemoteServiceStateUpdated notification.
   virtual RemoteServiceState GetCurrentState() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RemoteFileSyncService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_